Here's the link you want.
The season is a few weeks old and the squads are taking shape. I'd recommend you to send out a few emails and see what kind of reply you get from the guys who run the teams.
There is also another team who play close to Noksapyeong St., at Itaewon elementary school, most Saturdays and Sundays. I think they'll join the league later this year or maybe nexy?